System Environment: -------------------------- Platform: Pineview/Sandybridge/Ivbridge Kernel: (drm-intel-next-queued)e7e58eb5c0d1d7d1a42fcb2b5a247d28ec08b47e Bug detailed description: ------------------------- On PNV/SNB/IVB platform ,running gem_linear_blits of the Intel-gpu-tools will fail. the error on the console is like this: not enough RAM to run test, reducing buffer count Using 2432 1MiB buffers Verifying initialisation... Cyclic blits, forward... Expected 0x00000000, found 0x13380000 at offset 0x00000000 Aborted (core dumped) Here is the GDB backtrace: #0 0xb7fff424 in __kernel_vsyscall () #1 0x48ab6d71 in raise () from /lib/libc.so.6 #2 0x48ab864a in abort () from /lib/libc.so.6 #3 0x0804927f in check_bo (fd=<value optimized out>, handle=<value optimized out>, val=<value optimized out>) at gem_linear_blits.c:172 #4 0x080494da in main (argc=1, argv=0xbffff0d4) at gem_linear_blits.c:221 Here is a good kernel commit: Kernel: (drm-intel-next-queued)1d83f4426fa0555c98c989915be6df01a8125aca If have a demand,I can bisect it.
This should be fixed by the following patch from -fixes: commit 5d031e5b633d910f35e6e0abce94d9d842390006 Author: Chris Wilson <chris@chris-wilson.co.uk> Date: Wed Feb 8 13:34:13 2012 +0000 drm/i915: Remove use of the autoreported ringbuffer HEAD position
confirmed, the bug has been fixed with -fixes branch.
Closing old verified.
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